History of calendar dating
This concerned Gregory because it meant that Easter, traditionally observed on March 21, fell further away from the spring equinox with each passing year. Leap years don’t really occur every four years in the Gregorian calendar.The Julian calendar included an extra day in February every four years.By the year 4909, the Gregorian calendar will be a full day ahead of the solar year. Some Protestants viewed the Gregorian calendar as a Catholic plot.Though Pope Gregory’s papal bull reforming the calendar had no power beyond the Catholic Church, Catholic countries—including Spain, Portugal and Italy—swiftly adopted the new system for their civil affairs.It depends on the rotation and movement of the sun.As the sun moves from east to west, the shadows formed predict the time of the day. If the year is also divisible by 400, a leap day is added regardless.
If you were living in England or one of the American colonies 260 years ago, this date—September 13, 1752—didn’t exist. Instead, you would have gone to bed on the evening of September 2 and woken up on the morning of September 14.
Eleven days had been effectively skipped over as part of the parliamentary measure that implemented the Gregorian calendar, aligning Britain and its overseas possessions with the rest of Western Europe.
In most of the world today, people continue to track their days, months and years using the centuries-old system, so chances are you’re intimately familiar with its workings.
Still, there are a few things about the Gregorian calendar that might come as a surprise. The original goal of the Gregorian calendar was to change the date of Easter.
In 1582, when Pope Gregory XIII introduced his Gregorian calendar, Europe adhered to the Julian calendar, first implemented by Julius Caesar in 46 B. Since the Roman emperor’s system miscalculated the length of the solar year by 11 minutes, the calendar had since fallen out of sync with the seasons.